Excellent sounding little jewel. Amazing quality for price. As compared to my harman/kardon DAC (Burr-Brown chip), this DAC provides much wider sound stage, much clearer mid-ranges and vocals, and much tighter bass. Noise is well-controlled, even when the dongle is connected to a USB hub. Definitely does not need an isolator if used only with headphones. The only range in which the DAC could potentially perform better is in lower high range, where the sound seems to suffer from some harmonic distortion. But this is noticeable only because performance is so consistent across the rest of the range. I confirm that it works on iPad and on the new Ubuntu 14.04 Trusty. On iPad you may get inconsistent behavior if you connect the dongle directly to camera connection kit. You will need an unpowered USB hub (any hub works) to get around the software limitation imposed by Apple that prevents third party devices to work properly on camera connection kit.
superb sounding little DAC.
Very airy, natural, detailed and linaer sound. Does not alternate your music in any way. No background noise recogniseable even on highest volume setting on my headphone amplifier. I am using the DAC with my STAX SR-307/SRM-323 amp electrostatic headphones combo and can very much recommend this combination. With high res 88200 or 96000 Hz FLAC files and binaural recordings for best 3d immersion it's just fantastic. I downsmple19200 Hz files to 96000 Hz with SoX in foobar2000 and can't hear a loss compared to my Fiio X3, which is capable of 192000 Hz asynchronous USB playback. I have compared the DAC to my Fiio X3 as external DAC and find the Sabre DAC superior to the Fiio.
I'm using this to bypass the crappy on-board sound card on my Asrock motherboard. I'm using Grado SR60s, so definitely nothing fancy. Needless to say, gone is the audible hiss with no noise present, and music sounds wonderful! I haven't heard music this clear and detailed in such a long period of time.
The only thing negative about this device, on no fault of its own or its designers, is that it doesn't work with USB OTG for my Moto X or HTC One. I guess those phones don't provide enough power through the USB port to power the device. I've tried a standard USB OTG cable and the special cable that has an additional Y splitter to provide power, but it still doesn't work. I haven't seen any mentions of the above combination working, so there you go, it DOESN'T work.
I'll probably try a powered usb hub soon.
Superb. Detailed, airy, balanced, rhytmic. For the price, a bargain.
Just received this a couple days ago. I have it hooked up to a Macbook, feeding into an old Hitachi tube amp and a pair of 3 way Infinity tower speakers. I use it mostly for streaming audio or ITunes playback, plus occasional FLAC playback through VLC. It works great! Sometimes when I first hook it up or switch between applications there's no signal for a very short while - closing and reopening the offending application has always fixed this so far. Otherwise it's awesome. Sounds good, and louder for whatever reason than the built in Macbook audio port which is an unexpected bonus. I was worried it might just reveal all the flaws in my terrible low quality sources, but nothing sounds worse and it's actually fixed a mysterious mid-range grinding sound that was happening intermittently. High quality FLAC files sound awesome, of course. Highly recommended - at this price you don't have much to lose.